[linux-dvb] Re: i2c problems with dvb-kernel

[Michael Hunold <hunold-ml@web.de>]

Hello Peter,

> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_transfer(): msg:1/2
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_transfer(): msg:2/2
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): before: 0xd005b5e8 (status: 0x00000100), 0
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): after: 0xd005b5e8
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): before: 0xc10000d0 (status: 0x00000100), 0
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): error in address phase.
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_transfer(): error while sending message(s). starting again.
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_reset(): busy_state detected.
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_reset(): error_state detected. status:0x00000142
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): before: 0xd005b5e8 (status: 0x00000100), 0
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): after: 0xd005b5e8
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): before: 0xc10000d0 (status: 0x00000100), 0
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_writeout(): after: 0xc188b5d0
> Jan 12 10:53:11 mozart kernel: saa7146: saa7146_i2c_transfer(): transmission successful. (msg:2).
> Jan 12 10:53:11 mozart kernel: drivers/media/dvb/frontends/stv0299.c: setup for tuner SU1278/SH
> Jan 12 10:53:11 mozart kernel: DVB: registering frontend 0:0 (STV0299/TSA5059 based)...
So the question is: why is the transfer failing for the first time, but 
suceeds for the second time?

Is the i2c speed too high? It's the same as for the DVB driver.

Did I change something essential in the i2c logic? No, I changed the new 
driver to work just like the old driver did. It's clearly an address 
error there, so there is something screwed up.

Is there a special programm of the saa7146 needed? (gpio pins perhaps?)

> Peter
And your driver works with the DVB driver? Can you please load the 
module with

> insmod av7110/dvb-ttpci.o av7110_debug=255 saa7146_debug=255

and send the trace? Perhaps we can see what's happening for the DVB 
driver...

CU
Michael.




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